Balancing device for polishing wheels and the like



Aug. 6, 1935. w. A. BURGESS 2,010,687

BALANCING DEVICE FOR POLISHING WHEELS AND THE LIKE Filed April 13, 1954MY/fam /l. Bur 76.5.5

Patented Aug. 6, 1935 UNITED STATES PATENT F F [CE BALANCING DEVICE FORPOLISHING? 1 wuEELs ANn THE LIKE:

A'..Burgess; Jackson, Mich.

Application :April 13 1934; Serial Na 7120,499

a claim (Cl.=51'- -169)' present invention relates -to improvements inbalancingdevi'ces for rotatable: bodies,- being particularly adapted forthe balancing of unbalanced force-in' rapidly rotated machine parts andtools such as, for example, polishing wheels,

grinding wheels, fly wheels; etc.

Heretofore innumerable balancing devices have I been developed forbalancing polishing wheelsand the like, as-is exemplified by thepatenttmNichoIs No. 1,218,689. These devices, for

themost-part, have been-expensive and-cumbersome and require in theirinstallation some special form I of attachment or special adapter. As aresult; up tothe present time; none-of such devioes have experienced'any extensive adaption and very crude and relatively dangerous methadsand means are: being employedin well q pped plants by the: operators forbalancing rapidly rotated" machine tools, particularly polishingwheels:Forexample, it is aicommon practice rorran operator toba1ance:a1-polishing:whee1 byrnailin'g orotherwise aflixing lead weightsor .washers to the: side ofthe wheeliat points'spaced from the 'axisrofrotation; It is' in'otiatiall an uninvention to' provide: aninexpensivegz. compact baldevice. .which may be readily associated witha rotatable body; to quickly'and accurately balance 'the same; whichrequiresno special? form of' attachment orradapter'in its installation,and which canjnotfiy, off even in the event it becomes loosened and.its: balancing efiect. perhaps imepaired.

Other objects and advantages residing in the arrangement, combination"and construction of parts will become apparent from the detaileddescription to follow. The invention is clearly defined in the appendedclaims which are intended to cover all such changes and modifications ofthe herein illustrated form of the invention as fall within the scopethereof.

In the drawing, wherein a preferred form of the invention is illustratedas employed in connection with a polishing wheel,

Fig. 1 is a perspective view of the balancing device,

Fig.2 is a side elevation of a polishing wheel with the balancing deviceshown in position, and

Fig. 3 is a partial sectional view taken on line III-III of Fig. 2.

Generally, the present invention comprises a balancing device in theform of a washer-like member having an opening thereinto receive'theshaft, arbor or spindle upon which the rotatable body-is mountedzPreferably; the balancing device takes the'form of an elongated"and/or'irregular "shaped' washer-like member having 'an 5 elongated slottherein of substantially the same width as the diameter of v the shaft,arbor or spindle upon which the rotatable body is mount-'- ed. i. In thecase of polishing and grinding wheels the balancing-device is insertedover thearbor or 'spindle-upon which the wheel is mounted and isconfined an'd clamped in positionbetweenone side ot the wheel and one ofthe usual clamping flangesln' V Although it is possible and will be,perliaps, desirable:- in' some cases to retain the balancing device J ina counter-balancing 'positionrelative to the rotatable body solelyby aclamping action against the side thereof, it i is particularlyadvantageous and desirable to fixedly secure a portion otthe balancingdevice, spaced from the axis-of rotation;.to the side or the rotatablebody. In the case of the conventional polishingwheel this may be:accomplished: by a nail or other such fastening; means forced through anaperture in the deviceandfembedd'ed inthe sideofthe wheel.

Having specific reference tothe drawing. in Fig:- 1 one suitable iorniofthe invention is'illus trated.". As shown, the balancing devicellftakes the form of arotatable flat' washer-likemember, preferably=of*a= relatively heavy-metal, which may be'vcast oritdie punchedor-otherwise suitably fab ricatedi Anelongated sl'ot I2 is providedatone end andrex-tends through the intermediate section 'ofi-thezdevice.. Iri the embodiment shown the mass of thedevice isconcentratedatone end as atJA-z. aperture lt :may beprovided to-receive a-nailorethelikaitoilocate one end or the device against the side of the bodyto be balanced. The slot I2 is preferably approximately the same widthas the diameter of the shaft, spindle or arbor upon which the body to bebalanced is mounted. Obviously where the body is provided with a hub,collar or similar structure, the slot l2 will be of a width toreceivesuch structure to locate the same against the side of the body.Although the slot could be extended throughout substantially the lengthof the device In, efiectiveness and compactness is accomplished byterminating the inner end l8 of the slot l2 at approximately the centerof mass of the device.

As shown in Figs. 2 and 3, the balancing device In is shown receivedover the threaded end of the spindle 20 and located between one of theflanges 22 and the inner side of the polishing wheel 24.

These fianges clamp and position the polishing wheel through thetightened nuts 26 in a well known manner. As shown the outer end of thedevice H! is fixedly located with reference to the out of balanceportion of the wheel by being nailed as at 28 to the side of the wheel.

In balancing the polishing wheel, the heavy or out or" balance portionof the wheel is located in any suitable manner. Thus with the balancingdevice radially disposed and with the heavy end M located-diametricallyopposite the heavy portion of the wheel, the device is adjusted radiallyWith the slot 52 straddling the bore of the wheel until the balance iseiiected. The outer end of the device it is then nailed to the side ofthe wheel and with the spindle extending through the slot H the devicewill be permanently retained in balancing position. h It wil l bereadily apparent that the balancing device cannot fly off even though itmay become loosened from the side of the wheel.

Having described my invention in amanner thoughtto be sufficient toenable those skilled in the art to. employ and practice the same, what Iclaim-as new and desire toprotect by- Letters Patent is: j a

l. -In combination, a rotatable body, means up-onwh-ich said body ismounted for rotation, a device for balancing said body comprising anelongated unitary member embracing and extendingon opposite sides ofsaid means and being capable ofradialadjustment to eccentricallyposition its center otmass to balance said body, and means for afiixingsaid member directly to said body to rotate therewith as a unit.

I 2 In combination, a rotatable body, means upon -,which said body ismounted for rotation,

a device for balancing saidbody comprising a .memberdefining anelongated slot within which said means isireceived, said slot enablingsaid member to be radially adjusted to eccentrically position its centerof mass to balance said body, andia clamping plate for affixing saidmember directly to said body to rotate therewith as a unit. 3. Incombination, a spindle, av rotatable body having a borethrough whichsaid spindle is exj tended, a balancing device comprising a memberadjusted to be affixed to the side of said body, means defined in saidmemberstraddling said bore and embracing said spindle, said meansenjabling said member to be radially adjusted to eccentrically positionits center of mass to bal+ ance said body, and means-for securing saidmember directly to said body to rotate as a unit therewith, said meanscomprising a clamp and means engaging both said'member and said body.

A. In combination, a spindle, a rotatable polishing wheel having a borethrough which said spindle is extended, an elongated relatively flatbalancing device having an elongated slot defined therein said slothaving a greater portion of its extent disposed to one side or" thecenter of mass of said member, said slot straddling said bore andembracing said spindle and enabling said member to be radially adjustedto eccentrically position its center of mass to balance said body,flanges located upon said spindle upon opposite sides of said wheel andmeans for clamping said wheel and member between said flanges wherebysaid member is fixedly positioned relative to said wheel and is adaptedto rotate therewith as a unit.

5. A balancing device for a rotatable body having a fixed axis ofrotation and means extending along the axis of rotation of said body forsupporting the same, comprising a relatively fiat member, an elongatedslot defined by said member adapted to embrace said means to permitradial adjustment relative to saidaxis and to eccentrically positionwith reference to said axis the center of mass of said member, and means,for affixing said member in directcontact with said body to rotatetherewith as a unit.

6. A balancing device for a rotatable body having a fixed axis ofrotation and means extending along the axis of rotation of said body forsupporting the same, comprising a member, an elongated slot defined bysaid memberadapted to encircle said means to permit radial adjustmentrelative to said axis, and to eccentrically position with respect tosaid axis the center of mass of the member, and means. for affixing saidmember in direct contact with said body to rotate therewith as a unit. j

'7. A balancing device for a rotatable body having a fixed axis ofrotation and a portion extendingaxially along said axis of rotationcomprising a relatively fiat member having an elongated slot definedtherein adapted to receive the portion of the body to permitradialadjustment relative to said axis, said slot being unbalanced in saidmember with reference to the center of mass :thereof. 1

'8. A balancing device of thetype described adapted to be affixed to theside of a polishing lwheel'assembly and the like having a fixed axis ofrotation and a portion extending axially along 'said'.axis comprising anelongated fiat member, a slot defined by said member having the greaterportion of its extentdisposed on one side of the center of mass of saidmember, said slot being adapted to receive the axially extending portionof the assembly to permit radial adjustment relative to the axis ofrotation. I

- A. BURGESS.

